MT4463 Library

Presentations

• Large-Signal Measurements Characterize Non-linear Component Behavior.
  M. Vanden Bossche, Frans Verbeyst
  Workshop WME: More efficient circuit design by means of large-signal models and large-signal measurements.
  IMS June 2004 – Forth Worth, Texas
  It is shown that wrong conclusions can be drawn measuring S-parameters, while increasing the source power. Large-signal measurements provide insight in what is going wrong. A short overview is given of a setup that measures the basic information (voltage and current or incident and reflected wave) in a calibrated way. Finally, some measurement capabilities are demonstrated.
  (pdf - 3.7 MB)
• An improved Harmonic Phase Reference for LSNA capabilities up to 50 GHz.
  M. Vanden Bossche
  4th ARFTG NVNA Users’ Forum
  IMS June 2004 – Forth Worth, Texas
  Some results are shown to the NVNA community of the phase calibration efforts up to 50 GHz going on at NMDG in support of the MTT463 product.
  (pdf - 6.3 MB)

Articles

• Speed up power amplifier design by fast source-pull, real-time load-pull and accurate measurement-based behavioural models.
  Frans Verbeyst, M. Vanden Bossche
  Microwave Engineering Europe - Editorial, November 2005, p. 24 - 30
  This article describes an alternative which overcomes the drawbacks of the existing state of the art source- and load-pull techniques with respect to speed. Also the proper integration of this data into simulators is addressed, both with respect to ease and accuracy.
  First, a real-time alternative for fundamental load-pull measurements is described, which is based on smart active injection. Using a large-signal network analyzer, both the fundamental and harmonic behaviour of the component can be observed separately under varying load conditions. As verification, the resulting power delivered to the load at the fundamental is compared to the one obtained using a classical load-pull technique.
  Next, it is demonstrated that, for a specified load, one can quickly provide fundamental source-pull information for a range of available input powers by performing a single input power sweep using a regular synthesizer. A prematch tuner can be used to overcome power limitations of the source. Again, as verification, the resulting source-pull data is compared to the one obtained using a classical source-pull technique.
  Finally, a measurement-based behavioural model is extracted for a given swept input power and specified region of load conditions. This measurement-based model can be used in commercially available simulators in a straightforward way and includes all behavioural information of the component under varying source and load conditions. Amongst others, one can simulate the power delivered to the load under varying source and load conditions and compare it to the data obtained using the classical source- and load-pull technique.
  (pdf - 1 MB)